between extracted anthraquinone (mg/g root
powder) and the initial extraction cost of
anthraquinone (Baht/mg) listed in Table 1. Even
though, there was no statistical difference at 95%
CI in the initial extraction cost between the soxhlet
and pressurized steamer, the cost ratio from both
methods differed by almost 10 times (2.25 for
soxhlet method with 50% ethanol and 22.2 for
pressurized steamer method).